Features of book: * Edited by recognised experts with contributions from respected researchers and pioneers in the field. * Covers the whole spectrum of watermarking techniques, from robust to fragile and semi-fragile. * Focuses on watermarking in still images in order to provide a framework for the application of the described techniques to other media, such as video and audio. * Provides a valuable comparison of the available watermarking algorithms and techniques for their application. * Outlines the likely growth area and future trends for the application of current watermarking techniques.